CELLS Flashcards
Movement of material into cells by formation of vesicle
Endocytosis
Secretion of material from cell by vesicle
Exocytosis
Basic living unit of life
Cell
Study of cells
Cytology
Study of cellular function
Cell Physiology
Specialized structures
Organelles
Surrounds nucleus
Cell Membrane
Arrangement of cells in the cell membrane
Fluid-Mosaic Model
Allows substances to pass in or out of the cells
Selectively permeable
Diffusion of water across a selectively permeable membrane
Osmosis
Lower Concentration
Hypotonic
Higher concentration
Hypertonic
Same concentration
Isotonic
Movement of a solute from an area
Diffusion
Concentration of solute
Concentration Gradient
Moves substances from a higher to lower concentration
Facilitated diffusion
Movement of a substance across a membrane by means a carrier of molecule
Carrier-Mediated Transport
Does not require the cell to expand energy
Passive Membrane Transport
Does recquire the cell to expand energy
Active Membrane Transport
Moves substances from lower to higher concentration; requires atp
Active Transportation
Uses the energy of one substance moving down its concentration
Secondary Active Transport
Cell eating
Phagocytosis
Cell-drinking
Pinocytosis
Cell’s Framework
Cytoskeleton
Types of Cytoskeleton
Microtubules
Intermediate filament
Microfilament
Provide structural support ; Assist in cell division
Microtubules
Medium diameter;maintains cell shape
Intermediate filament
Smallest diameter; determine cell shape
Microfilaments
Nucleotide Pairs
Cytosine - Guanine
Thymine - Adenine
The process in which the information in DNA directs protein synthesis
Gene Expression
Process in which DNA is read
Transcription
Process by mRNA is converted into amino acids (polypeptides)
Translation
Series of events that produce new cells for growth and tissue repair
Cell Cycle
Two phases of cell cycle
Interphase
Cell division
The non-dividing phase in which the DNA replicates
Interphase
Formation of two daughter cells from a single parent
Cell Division
The cell contains how many chromosomes?
46
Divided into four phases
Mitosis
Four stages of Mitosis
Prophase
Metaphate
Anaphase
Telophase
Each chromosomes consists of two chromatids joined at centromere
Prophase
Chromosomes align
Metaphase
Chromatids separate
Anaphase
Two separate nuclei; cell division is completed
Telophase
Called the “sex cells”
Meiosis
XX
Female
XY
Male
Cells develop specialized structures and functions
Differentiation
Programmed cell death ;regulates cells within cell tissues
Apoptosis
Sequence of nucleotides
Genes
Meaning of mRNA
Messenger RNA
Meaning of TRNA
Translation RNA